Meitnerium (/maɪtˈnɪəriəm/myt-NEER-ee-əm or /maɪtˈnɜriəm/myt-NUR-ee-əm) is a chemical element with the symbol Mt and atomic number 109. It is placed as the heaviest member of group 9 (or VIII) in the periodic table but a sufficiently stable isotope is not known at this time which would allow chemical experiments to confirm its position as a heavier homologue to iridium, unlike its lighter neighbors. It was first synthesized in 1982 and several isotopes are currently known. The heaviest and the most stable isotope known is 278Mt, with a half-life of ~8 s.
Meitnerium was formerly known as unnilennium, bearing the symbol Une. Historically, meitnerium has been referred to as eka-iridium. The name meitnerium (Mt) was suggested in honor of the Austrian physicist Lise Meitner, a co-discoverer of protactinium (with Otto Hahn), and one of the discoverers of nuclear fission. In 1994 the name was recommended by IUPAC, and was officially adopted in 1997.
With cascading crises – where one event triggers another – set to rise, international disaster risk reduction efforts are woefully underfunded. Global development is supported by. Bill and Melinda Gates Foundation. @swajones ...Last year, earthquakes, floods, heatwaves and landslides left (pdf). Yet the international community spends less than half of one per cent of the global aid budget on mitigating the risks posed by such hazards ... ....
Kim Kardashian attended a friend’s wedding this past weekend and she captured the night’s events with some racy images that are definitely NSFW... 001. A photo posted by Kim Kardashian West (@kimkardashian) on Apr 23, 2016 at 6.05pm PDT. 014 ... 006 ... He married model IsabelaRangel ... ....
Papa Wemba, a musician known around the world as the king of Congolese rumba, has died following a collapse on stage during a concert, officials said. He was 66. Culture MinisterBaudouin Banza Mukalay confirmed the musician’s death on Sunday, calling it a “great loss for the country and all of Africa.” ... He was taken to a nearby clinic, but couldn’t be resuscitated ... Keywords....
A panel of international experts investigating the disappearance of 43 Mexican trainee teachers in 2014 says the government of PresidentEnrique PenaNeto has hampered its inquiries. In its scathing final report, the experts also dismissed the conclusions of the official inquiry. They said officials failed to pursue the investigative lines they suggested ...Analysis from KatyWatson, BBCNews, Mexico City ... ....
German researchers added a strongly European flavour to the naming scheme, honouring the physicists Niels Bohr (bohrium), Lise Meitner (meitnerium), and Wilhelm Röntgen (roentgenium), the astronomer Nicolaus Copernicus (copernicium) and their home city and state – darmstadtium and Hassium are named after the town of Darmstadt and the German state of Hesse (passing through Latin along the way, which changes the ‘e’ to an ‘a’ ... ....
RachelSwaby, author of a book highlighting women’s contributions to science, chooses her favourite female scientists, from the greatest dinosaur hunter to the inventor of Kevlar. Rachel Swaby. Friday 22 May 2015 12.00 BST. Mary Anning. Palaeontologist (1799-1847) Facebook Twitter. Photograph. B.J.Donne/Sedgwick Muesum ... Her work was often showcased and published without credit ... In 1997 the heavy element meitnerium was named in her honour ... AP....
This element's dubious origins launched a scandal in the world of nuclear physics. This week, we meet the last element that has been synthesised so far. This element is ununoctium, which has the temporary atomic symbol, Uuo and the permanent atomic number, 118 ... This element is known from just three atoms that were claimed to have been synthesised three years apart ... Some physicists even predict half-lives of millions of years ... ... Meitnerium....
One of this element's parents traveled across the Atlantic Ocean more times in just a couple days than a career diplomat!. Berkelium. It took 250 days to make enough berkelium, shown here (just 22 milligrams, dissolved), to synthesize element 117. Image. ORNL, Department of Energy (public domain) ... This is the penultimate element that we will meet in this series ... [Video link]. .... .. .. .. .. .. .. .. .. .. ... Livermorium ... Ununpentium ... Meitnerium ... Radon....
What do ununhexium, eka-polonium and nottingium share in common?. The Professor likes Lego too!. Image. screengrab/Periodic Videos. This week's element is livermorium, which has the atomic symbol, Lv, and atomic number, 116. This is the last of the elements that we'll meet that has a permanent formal name (at this time) ... This element is predicted to be a solid metalloid at room temperature ... its name ... [Video link] ... .. .. .. .. .. .. .. ...Meitnerium ... ....
What do plankium, poliakoffium and Sweden share in common?. Artist's idea of the fusion reaction of calcium-48 nuclei with an americium-243 target. Image. United States Department of Energy (Public domain). We're getting closer to the end, my peeps! This week's element goes by the temporary name, ununpentium, and the temporary atomic symbol, Uup, along with the permanent atomic number, 115 ... [Video link] ... .. .. .. .. .. .. .. .. .. .. .. ... Meitnerium....
What does ununquadium and the island of Stability share in common?. The theoretical Island of stability in nuclear physics. Image. InvaderXan (Creative Commons Attribution-Share Alike3.0 Unported license.). This week's element is flerovium, which has the atomic symbol, Fl, and the atomic number, 114 ... This laboratory was named to honor Russian physicist Georgy Flyorov ... approximately 80 atoms have been observed so far ... (1969) ... .. ...Meitnerium....
What do japonium, rikenium and nishinanium share in common?. Scientists at Japan's RIKEN Nishina Center for Accelerator-based Science say they've finally succeeded in creating the synthetic element 113. Image. RIKEN. This week's element is ununtrium, which has the temporary atomic symbol, Uut, and the atmonic number, 113 ... It is predicted to be a very dense solid at room temperature ... This time, their discovery claim was accepted ... Meitnerium....
What do ununbium, Copernicus and China share in common?. This week's element is copernicium, which has the atomic symbol, Cn and the atomic number, 112. Originally known as ununbium, this element was named in honour of astronomer Nicolaus Copernicus, who discovered that the Earth orbits the Sun. Probably the most interesting aspect of this element is the reason it was given its atomic symbol ... ONE atom -- of copernicium-277 ... ... Meitnerium ... ....